The Royal Gunpowder Factory of Ruidera Curiosity · Ruidera, La Mancha, Ciudad Real Image of Ruidera, not of the place itself. Ruidera was home to a royal gunpowder factory that harnessed the power of the water from the lagoons, an activity of which traces still remain in the area. In 1800 an explosion at the factory forced the renovation of the nearby Casa del Rey. The Casa del Administrador, built in 1783, belonged to the manager of the royal gunpowder factory and mills. Photo: M.Peinado from Alcalá de Henares, España (CC BY 2.0) What to see and do in Ruidera